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KCSAN: data-race in touch_atime / touch_atime (3)

Status: moderation: reported on 2024/05/27 01:15
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+d339c673f459c1a220ea@syzkaller.appspotmail.com
First crash: 677d, last: 1d20h
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision Error
259e9fcc-0ce1-454e-92f4-8e1ec445445d repro ❓ KCSAN: data-race in touch_atime / touch_atime (3) 2026/03/07 09:13 2026/03/07 09:13 2026/03/07 09:15 31e9c887f7dc24e04b3ca70d0d54fc34141844b0
ad306710-8d6d-4019-977e-25553ed87ee5 assessment-kcsan Benign: ✅  Confident: ✅  ❓ KCSAN: data-race in touch_atime / touch_atime (3) 2026/02/24 19:14 2026/02/24 19:14 2026/02/24 19:18 305c0ec5cd886e2d13738e28e1b2df9b0ec20fc9
e14d95c5-5450-4e69-b5b1-6e29cc0b8072 assessment-kcsan 💥 KCSAN: data-race in touch_atime / touch_atime (3) 2026/01/10 00:03 2026/01/10 00:03 2026/01/10 00:03 7519916073b761ced56a7b15fdeeb4674e8dc125 Error 429, Message: You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. * Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0, Status: RESOURCE_EXHAUSTED, Details: [map[@type:type.googleapis.com/google.rpc.Help links:[map[description:Learn more about Gemini API quotas url:https://ai.google.dev/gemini-api/docs/rate-limits]]] map[@type:type.googleapis.com/google.rpc.QuotaFailure violations:[map[quotaId:GenerateRequestsPerDayPerProjectPerModel quotaMetric:generativelanguage.googleapis.com/generate_requests_per_model_per_day]]] map[@type:type.googleapis.com/google.rpc.DebugInfo detail:[ORIGINAL ERROR] generic::resource_exhausted: You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. * Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0 [google.rpc.error_details_ext] { message: "You exceeded your current quota, please check your plan and billing details. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits. To monitor your current usage, head to: https://ai.dev/rate-limit. \n* Quota exceeded for metric: generativelanguage.googleapis.com/generate_requests_per_model_per_day, limit: 0" details { type_url: "type.googleapis.com/language_labs.genai.debug.GeminiApiDebugInfo" value: "RM\nK\nEgenerativelanguage.googleapis.com/generate_requests_per_model_per_day\030\000\"\000" } details { [type.googleapis.com/google.rpc.Help] { links { description: "Learn more about Gemini API quotas" url: "https://ai.google.dev/gemini-api/docs/rate-limits" } } } details { [type.googleapis.com/google.rpc.QuotaFailure] { violations { quota_metric: "generativelanguage.googleapis.com/generate_requests_per_model_per_day" quota_id: "GenerateRequestsPerDayPerProjectPerModel" } } } }]]
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in touch_atime / touch_atime (2) ext4 6 51 713d 794d 0/29 auto-obsoleted due to no activity on 2024/05/19 09:43
upstream KCSAN: data-race in touch_atime / touch_atime ext4 6 21 926d 948d 0/29 auto-obsoleted due to no activity on 2023/10/18 23:00

Sample crash report:
 loop3: p4 < >
==================================================================
BUG: KCSAN: data-race in touch_atime / touch_atime

write to 0xffff888105784f78 of 4 bytes by task 3300 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1625 [inline]
 inode_update_atime fs/inode.c:2104 [inline]
 inode_update_time fs/inode.c:2162 [inline]
 generic_update_time fs/inode.c:2195 [inline]
 touch_atime+0x1d7/0x330 fs/inode.c:2273
 file_accessed include/linux/fs.h:2263 [inline]
 shmem_file_read_iter+0x477/0x540 mm/shmem.c:3482
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x6c0/0x7f0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:717
 __do_sys_read fs/read_write.c:726 [inline]
 __se_sys_read fs/read_write.c:724 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:724
 x64_sys_call+0x2886/0x3020 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888105784f78 of 4 bytes by task 3302 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1625 [inline]
 inode_update_atime fs/inode.c:2104 [inline]
 inode_update_time fs/inode.c:2162 [inline]
 generic_update_time fs/inode.c:2195 [inline]
 touch_atime+0x1d7/0x330 fs/inode.c:2273
 file_accessed include/linux/fs.h:2263 [inline]
 shmem_file_read_iter+0x477/0x540 mm/shmem.c:3482
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x6c0/0x7f0 fs/read_write.c:574
 ksys_read+0xdc/0x1a0 fs/read_write.c:717
 __do_sys_read fs/read_write.c:726 [inline]
 __se_sys_read fs/read_write.c:724 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:724
 x64_sys_call+0x2886/0x3020 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x2573ce32 -> 0x25d2a56d

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3302 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
==================================================================

Crashes (666):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/02 16:55 upstream 9147566d8016 91bc79b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/04/02 00:27 upstream 9147566d8016 0cb124d5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/31 08:09 upstream d0c3bcd5b897 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/29 17:28 upstream a3d97d1d3fa6 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/28 21:32 upstream cbfffcca2bf0 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/27 12:11 upstream 46b513250491 766b6434 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/26 13:06 upstream 0138af2472df 766b6434 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/26 07:34 upstream d2a43e7f89da c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/24 23:41 upstream 24f9515de877 74e70d19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/24 12:53 upstream c369299895a5 74e70d19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/24 08:44 upstream c369299895a5 baf8bf12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/22 18:42 upstream 113ae7b4decc 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/20 20:12 upstream 0e4f8f1a3d08 ac6f1dff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/20 13:33 upstream 8a30aeb0d1b4 2f245add .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/19 13:57 upstream 8a30aeb0d1b4 bd6dcb30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/19 01:39 upstream 8a30aeb0d1b4 0199f9a1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/18 05:24 upstream f0caa1d49cc0 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/17 08:22 upstream 2d1373e4246d c01bca74 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/17 05:03 upstream 2d1373e4246d 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/12 10:50 upstream 80234b5ab240 4efadf07 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/12 06:44 upstream 80234b5ab240 2d88ab01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/11 07:57 upstream b4f0dd314b39 86914af9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/08 16:02 upstream c23719abc330 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/07 11:59 upstream 651690480a96 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/06 17:43 upstream 5ee8dbf54602 41d8037d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/06 02:06 upstream 5ee8dbf54602 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/05 01:18 upstream ecc64d2dc9ff a9fe5c9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/04 19:15 upstream 0031c06807cf e6b6b96b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/03 02:15 upstream af4e9ef3d784 28b83e23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/02 21:39 upstream 11439c4635ed b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/03/02 06:00 upstream 39c633261414 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/28 12:50 upstream 4d349ee5c778 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/27 03:06 upstream 3f4a08e64442 a2f13f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/26 15:24 upstream f4d0ec0aa20d ffa54287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/26 03:20 upstream d9d32e5bd5a4 e0f78d93 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/24 17:11 upstream 7dff99b35460 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/24 06:35 upstream 7dff99b35460 41d2fa6a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/23 19:21 upstream 6de23f81a5e0 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/22 10:56 upstream fa5c82f4d2bb 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/21 12:54 upstream d79526b89571 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/20 22:12 upstream a95f71ad3e2e 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/20 15:14 upstream 8bf22c33e7a1 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/20 05:48 upstream 2b7a25df823d c8d8c52d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/19 02:41 upstream 23b0f90ba871 77d4d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/18 05:45 upstream 2961f841b025 39751c21 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/18 00:41 upstream d295082ea672 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/17 16:17 upstream 970296997869 06ec4f7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/17 08:43 upstream 970296997869 e439b951 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/02/16 18:58 upstream 0f2acd3148e0 5d52cba5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2026/01/09 09:55 upstream 623fb9912f6a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
2024/05/27 01:14 upstream 1613e604df0c a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in touch_atime / touch_atime
* Struck through repros no longer work on HEAD.